I'm bringing up this issue right now because there are four stickied posts right now in Sift Talk. Not that I think that that's too cluttered, but do we want to reach a consensus on how many posts should be stickied at one time? Maybe arrange for older posts to be unstickied when a new sticky-worthy Talk is created.

Just as a precaution, in case we've got hundreds of active diamonds in a year or so...

And please, don't sticky this. Four is quite enough.